/**
* Constructor...
*
* @param \r8\Seed $seed The seed to feed into the random number generator
*/
public function __construct(\r8\Seed $seed)
{
if (!extension_loaded('bcmath')) {
throw new \r8\Exception\Extension("BC Math extension required");
}
$this->num = abs($seed->getInteger());
// Throw away the first value
$this->nextInteger();
}
/**
* Runs the initialization routine on the resource and handles the results
*
* @param Resource $resource The encryption resource
* @param String $iv The initialization vector
* @return NULL
*/
private function initialize($resource, $iv)
{
$key = substr($this->key->getString(), 0, mcrypt_enc_get_key_size($resource));
$result = mcrypt_generic_init($resource, $key, $iv);
if ($result == -3) {
throw new \r8\Exception\Interaction("Incorrect encryption key length");
} else {
if ($result == -4) {
throw new \r8\Exception\Interaction("Unable to allocate memory for encryption");
} else {
if ($result === FALSE || $result < 0) {
throw new \r8\Exception\Interaction("An unknown error occured while initializing encryption resource");
}
}
}
}
/**
* Reverses the transformation on a string
*
* @param mixed $value The value to reverse transform
* @return mixed The original, untransformed value
*/
public function from($string)
{
$string = (string) $string;
$hashLength = $this->hashLength * ($this->readable ? 2 : 1);
$mac = substr($string, 0, $hashLength);
if (strlen($mac) !== $hashLength) {
throw new \r8\Exception\Data($string, "Transform String", "Unable to extract data verification hash");
}
$string = substr($string, $hashLength);
$compareHash = self::pbkdf2($string, $this->salt->getString(), $this->hashLength);
if ($this->readable) {
$compareHash = \bin2hex($compareHash);
}
if ($mac != $compareHash) {
throw new \r8\Exception\Data($string, "Transform String", "Data integrity verification failed");
}
return $string;
}
public function testRandom()
{
$this->assertThat(\r8\Seed::random(), $this->isInstanceOf('\\r8\\Seed'));
$this->assertNotEquals(\r8\Seed::random()->getSource(), \r8\Seed::random()->getSource());
$this->assertNotEquals(\r8\Seed::random()->getSource(), \r8\Seed::random()->getSource());
}
